Efcore: Is there a way to migrate in .netstandard with Xamarin.Forms package ?

[paradisehuman]

Hi.
I have a .netstandard Model layer that referenced from Xamarin.forms
I set Xamarin.Forms package in Model layer => PrivateAssets="All"
My .netstandard Data layer referenced from Model layer.
When I run this command in PowerShell :

dotnet ef --startup-project ../Eela.Web/ migrations add v1

I have this error :

C:\Users*.nuget\packages\xamarin.forms\2.3.4.231\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20\Xamarin.Forms.targets(40,3): error MSB4062: The "Xamarin.Forms.Build.Tasks.FixedCreateCSharpManifestResourceName" task could not be loaded from the assembly C:\Users*.nuget\packages\xamarin.forms\2.3.4.231\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20\Xamarin.Forms.Build.Tasks.dll. Could not load file or assembly 'Microsoft.Build.Utilities.v4.0, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. Confirm that the declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask. [.....\Eela.Model.csproj]

Even I'm using :
<PackageTargetFallback>$(PackageTargetFallback);portable-win+net45+wp8+win81+wpa8</PackageTargetFallback>
in Data layer but the problem is persisted,

Is there any way to resolve this problem ?

[bricelam]

What does your *.csproj file look like?

[bricelam]

Also, have you tried installing the Microsoft.EntityFrameworkCore.Tools package and using the Add-Migration PMC command?

[paradisehuman]

@bricelam
Data layer :

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup Label="Globals">
    <SccProjectName>SAK</SccProjectName>
    <SccProvider>SAK</SccProvider>
    <SccAuxPath>SAK</SccAuxPath>
    <SccLocalPath>SAK</SccLocalPath>
  </PropertyGroup>

  <PropertyGroup>
    <TargetFramework>netstandard1.6</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="1.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="1.1.1" />
  </ItemGroup>
  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="1.0.0" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..\Eela.Model\Eela.Model.csproj" />
  </ItemGroup>

</Project>

I solved it by removing Xamarin.Forms dependency,
In fact I wanted the Command.cs class in Xamarin.Forms ,and I got the Command.cs source and copy paste it t to my code and I used it.

No i didn't use Add-Migration. I will test it . thanks any way.

[bricelam]

Oh good. I'm glad you were able to solve it. It looks like the Xamarin.Forms package uses some MSBuild tasks that are incompatible with the dotnet command.

[bricelam]

You could probably work around it by updating the reference to look like this:

<PackageReferecne Include="Xamarin.Forms" Version="2.3.4.231">
  <ExcludeAssets>build</ExcludeAssets>
</PackageReference>

[paradisehuman]

@bricelam Thanks . I will test it ...
does Add-Migration use MSBuild ?

[bricelam]

Not directly; it uses the Visual Studio APIs instead.

[paradisehuman]

@bricelam

<PackageReferecne Include="Xamarin.Forms" Version="2.3.4.231">
  <ExcludeAssets>build</ExcludeAssets>
</PackageReference>

It worked like a charm ... Thank you ...

[paradisehuman]

@bricelam We have a proverb in Persian that says : "Nosh daro bad az marge Sohrab"
It means : eating drug to someone after his death .
But it will help me in future work probably.